This is a concept called "dialect prestige." AAVE and southern US dialects are "low prestige," despite the fact that among it speakers are plenty of individuals

This is a concept called "dialect prestige." AAVE and southern US dialects are "low prestige," despite the fact that among it speakers are plenty of individuals who themselves exhibit "high prestige" characteristics. I venture to say that, given his experiece as a community organizer in Chicago as well as his biracial composition, President Obama is likely a fluent speaker of AAVE and he's got just about the most prestigious job there is. If you need any more evidence of this dynamic, recall Harry Reid before the '08 Election. He characterized Obama as a ‘light-skinned’ African-American ‘with no Negro dialect, unless he wanted to have one.’